CN115493662A - Integrated ultrasonic flowmeter and system for aerospace - Google Patents
Integrated ultrasonic flowmeter and system for aerospace Download PDFInfo
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- CN115493662A CN115493662A CN202211452720.2A CN202211452720A CN115493662A CN 115493662 A CN115493662 A CN 115493662A CN 202211452720 A CN202211452720 A CN 202211452720A CN 115493662 A CN115493662 A CN 115493662A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
- G01F1/667—Arrangements of transducers for ultrasonic flowmeters; Circuits for operating ultrasonic flowmeters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention discloses an integrated ultrasonic flowmeter and a system for aerospace, wherein the integrated ultrasonic flowmeter for aerospace comprises a pipe section, wherein at least two ultrasonic probes are arranged on the outer wall of the pipe section in the front and back direction along the axial direction of the pipe section; the ultrasonic probe comprises a mounting seat fixedly arranged on the outer wall of the pipe section; the mounting seat is internally provided with a sound wedge, the sound wedge comprises a slope surface, and a ceramic piezoelectric sheet for exciting or receiving ultrasonic waves is attached to the slope surface; acute angle included angles between the ceramic piezoelectric sheets in the two mounting seats and the central axis of the pipe section are complementary, and the length of the acoustic wedge satisfies a formula
The invention simplifies the structure of the prior pipe-section ultrasonic flowmeter, ensures that ultrasonic waves can be received without installing a reflector in the pipe by setting the installation angle of the ceramic piezoelectric sheet and the length of the acoustic wedge, and greatly improves the robustness.
Description
Technical Field
The invention belongs to the technical field of non-contact flow measurement, and particularly relates to an integrated ultrasonic flowmeter and system for aerospace.
Background
The ultrasonic flowmeter is an instrument for measuring the liquid flow in a circular tube by using a speed difference method as a principle. The structure of the ultrasonic flow metering pipeline is specifically a fluid metering pipeline provided with a bidirectional ultrasonic receiving and transmitting integrated transducer, ultrasonic signals are alternately transmitted in the forward flow direction and the reverse flow direction and received to generate echo signals, the propagation time difference generated by one-time alternation of the ultrasonic waves in fluid propagation is calculated, and then the flow rate of fluid in the pipeline is calculated through a related conversion mathematical model.
The ultrasonic flowmeter has the advantages of non-invasion, no moving part, non-contact measurement and the like, and can be installed at a non-fixed point as long as the ultrasonic transducer is installed outside the pipeline. In addition, the ultrasonic flowmeter is used for measuring without flow interference, has no extra pressure loss and is not restricted by the measuring tube diameter. In recent years, with the development of space and space technology, ultrasonic flow meters are applied to aviation and spacecrafts more and more due to the above.
Chinese patent CN201420785721.3 discloses an ultrasonic flow measurement pipe section, which comprises an outer pipe and an inner pipe capable of tightly limiting the outer pipe, wherein the inner pipe is an upper inner pipe and a lower inner pipe which can be assembled and disassembled, an ultrasonic transducer mounting hole which is formed integrally with an inner pipe body and used for mounting an ultrasonic transducer is arranged on the inner pipe, and the hole extends to the outside of the pipe section through a yielding hole which has the diameter equivalent to that of the ultrasonic transducer mounting hole on the outer pipe. And a sealing ring is arranged on the periphery of the connecting part of the ultrasonic transducer placing hole and the inner tube body, and the sealing ring is tangent to the inner tube wall of the outer tube, the outer tube wall of the inner tube and the peripheral wall of the ultrasonic transducer placing hole. In order to enable the two ultrasonic transducers to transmit and receive ultrasonic waves to and from each other, a mirror should be further provided inside the pipe for reflecting the ultrasonic waves to enable them to reach the other transducer.
As an aviation and aerospace instrument, the stability and robustness of the instrument are ensured firstly due to the particularity of the environment. However, the ultrasonic flowmeter in the prior art has more devices and a more complex structure, so that the probability of problems is increased.
Disclosure of Invention
The invention aims to provide an integrated ultrasonic flowmeter and an integrated ultrasonic flowmeter system for aerospace, which simplify the structure of the existing pipe-section type ultrasonic flowmeter and improve the stability and the robustness.
In order to solve the above mentioned technical problems, the present invention specifically adopts the following technical solutions: an integrated ultrasonic flowmeter for aerospace comprises a pipe section, wherein at least two ultrasonic probes are arranged on the outer wall of the pipe section along the axial direction of the pipe section; the ultrasonic probe comprises a mounting seat fixedly arranged on the outer wall of the pipe section; the mounting seat is internally provided with a sound wedge, the sound wedge comprises a slope surface, and a ceramic piezoelectric sheet for exciting or receiving ultrasonic waves is attached to the slope surface; acute included angles of the ceramic piezoelectric sheets in the two mounting seats and the central axis of the pipe section are complementary, and the length of the acoustic wedge and the incident angle of the ultrasonic wave in the acoustic wedge satisfy the formula:
。
wherein the content of the first and second substances,
is the inner diameter of the pipe section,
in order to be the length of the acoustic wedge,
is the incident angle of the ultrasonic wave in the acoustic wedge.
For the speed of propagation of the ultrasonic waves in the pipe fluid,
is the propagation velocity of the ultrasonic wave in the acoustic wedge.
As an improvement, the mounting seat is cuboid and is defined by a top cover, a pipe section outer wall and four side walls; the four side walls, the acoustic wedges and the pipe section are integrally formed. The number of connection points between components is reduced, the probability of faults is reduced, and the stability is improved.
As an improvement, the installation seat is filled with pouring sealant. The ceramic piezoelectric plate is prevented from shaking by the pouring sealant, and meanwhile, the pouring sealant can absorb redundant sound waves, so that the directivity of ultrasonic waves is improved.
As an improvement, the two ends of the pipe section are welded with the conveying pipe of the medium to be metered. The sealing device is connected with the medium conveying pipeline in a welding mode, so that the sealing performance and the stability are improved.
As an improvement, flanges used for being connected with a conveying pipe for a medium to be measured are arranged at two ends of the pipe section, and the pipe section is more convenient to install and disassemble.
As an improvement, a connector used for being connected with an upper computer is arranged on the mounting seat.
As an improvement, the pipe section is cylindrical, and the two ultrasonic probes are positioned on the same generatrix of the pipe section. The measuring result is more accurate.
As an improvement, the ultrasonic probes are divided into two groups, and one group of ultrasonic probes comprises a front ultrasonic probe and a rear ultrasonic probe which are positioned on the same bus of the pipe section; the two groups of ultrasonic probes are positioned on the same plane. One of the two groups of ultrasonic probes is used as a main detection, and the other group is used as a backup. When 4 probes are positioned on the same plane, two probes positioned on the diagonal can also detect.
The invention also provides an integrated ultrasonic flowmeter system for aerospace, which comprises two integrated ultrasonic flowmeters for aerospace; one of the two aerospace integrated ultrasonic flow meters is used for detecting the flow of an oxidant in an oxidant pipeline, and the other aerospace integrated ultrasonic flow meter is used for detecting the flow of fuel in a fuel pipeline; the system also comprises two sets of control systems, wherein one control system is a main control system, and the other control system is a backup control system; the main control system and the backup control system are respectively connected with two groups of ultrasonic probes in the integrated ultrasonic flowmeter for aerospace.
The invention has the advantages that: the integrated ultrasonic flowmeter and the system with the structure for aerospace and aviation have the advantages that the structure of the existing pipe-section ultrasonic flowmeter is firstly simplified, and the pipe-section ultrasonic flowmeter is enabled to receive ultrasonic energy without installing a reflector in a pipe by setting the installation angle of the ceramic piezoelectric plate and the length of the acoustic wedge, so that the robustness is greatly improved. Secondly, the connection points of the whole device are reduced through an integrated structure, and the sealing performance and the stability of the equipment are improved. And through the redundant arrangement of the probes, when one group of probes fails, the other group of probes can be started immediately, so that the interruption of the measurement work is avoided. Through the improvement, the invention is suitable for the aerospace working condition lacking the maintenance condition.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale. It is apparent that the drawings in the following description are of some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive step.
FIG. 1 is a schematic structural diagram of an integrated ultrasonic flow meter for aerospace according to an exemplary embodiment of the invention;
FIG. 2 is a cross-sectional view of an integrated ultrasonic flow meter for aerospace use in accordance with an exemplary embodiment of the invention;
FIG. 3 is an exploded view of an integrated ultrasonic flow meter for aerospace use in accordance with an exemplary embodiment of the invention;
FIG. 4 is a schematic diagram of the transmission of ultrasonic waves within a pipe segment according to the present invention;
FIG. 5 is a schematic diagram of the ultrasonic waves received by the acoustic wedge of the present invention;
FIG. 6 is a schematic diagram of an integrated ultrasonic flow meter system for aerospace according to an exemplary embodiment of the invention.
The mark in the figure is: 1, 2, ultrasonic probes, 21 ceramic piezoelectric sheets, 22 acoustic wedges, 23 mounting seats, 24 connectors, 231 side walls, 232 top covers, 233 potting adhesive and 234 sealing rings; h is w Is the wall thickness of the pipe section.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Herein, suffixes such as "module", "part", or "unit" used to indicate elements are used only for facilitating the description of the present invention, and have no particular meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.
Herein, the terms "upper", "lower", "inner", "outer", "front", "rear", "one end", "the other end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As used herein, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such that the terms "connected," or "connected," as used herein, may be fixedly connected, detachably connected, or integrally connected; they may be mechanically coupled, directly coupled, indirectly coupled through intervening media, or interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Herein "and/or" includes any and all combinations of one or more of the associated listed items.
By "plurality" herein is meant two or more, i.e. it includes two, three, four, five, etc.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a component of' 8230; \8230;" does not exclude the presence of another like element in a process, method, article, or apparatus that comprises the element.
The existing ultrasonic flow meters are divided into three types: plug-in, clamp-in, and tube-segment.
Where an insertion probe needs to be placed inside the pipe. What needs to be solved in the present invention is the metering of oxidants and fuels in spacecraft, where the oxidants corrode the probe, so that the insertion type ultrasonic flow meter is first eliminated.
The clamping type mainly adopts the structure that the flowmeter with the clamp and the like is arranged on a fuel or oxidant pipeline, namely the ultrasonic probe and the pipe body are designed in a split mode, so that the ultrasonic probe is additionally arranged on the pipe body, and only the other clamp or the reinforcing device is adopted. On the one hand, the provision of a reinforcement means increases the overall weight, but due to the aircraft, it is desirable that the weight of this flow meter is as light as possible, so that the aircraft can carry further loads. And in the field of outer space, such as lunar landing, if the device is weighted by one kilogram, the cost is increased by the cost equivalent to one kilogram of gold.
On the other hand, during the flight of the aircraft, vibrations, such as rockets, are generated, and the reinforcing device is likely to loosen after a long time. If loosened, there are voids between the probe and the wall of the pipe, which affect the strength of the sound wave and even block the propagation of the sound wave signal (e.g. there is a vacuum in the voids, i.e. the sound wave is not propagated without a transmission medium, and naturally cannot propagate).
On the other hand, after the reinforcing device is loosened, the probe can be displaced, and the distance of sound wave transmission is changed, which affects the performance of measurement, for example, the precision is greatly reduced.
The clamp-on ultrasonic flow meter is also eliminated.
In order to ensure that the two probes can transmit and receive ultrasonic waves, the conventional pipe-segment type ultrasonic flowmeter needs to be provided with a plurality of reflectors between the two probes in a pipeline, and the reflectors ensure that the ultrasonic waves can be smoothly received. However, the mirror is also an unstable factor, and if only one of the angles is changed, the ultrasonic wave is shifted and cannot be received, so that the whole flow meter is failed.
Aiming at the problems of various conventional ultrasonic flow meters in aviation and aerospace application, as shown in fig. 1 to 5, the invention provides an integrated ultrasonic flow meter for aerospace, which comprises a pipe section 1, wherein the pipe section 1 is preferably a straight pipe, so that bubble accumulation is avoided. At least two ultrasonic probes 2 are arranged on the outer wall of the pipe section 1 along the axial direction of the pipe section; the ultrasonic probe 2 comprises a mounting seat 23 fixedly arranged on the outer wall of the pipe section 1; a sound wedge 22 is arranged in the mounting seat 23, the sound wedge 22 comprises a slope surface, and a ceramic piezoelectric sheet 21 for exciting or receiving ultrasonic waves is attached to the slope surface; in order to facilitate connection with an upper computer, the mounting seat 23 is provided with a connector 24, such as an SMA connector, and the specific choice of the connector is not limited in the present invention. The application of a voltage to the ceramic piezoelectric sheet 21 can excite an ultrasonic wave and also convert the received ultrasonic wave into a corresponding electric signal. Of course, a control system is also required to convert the electrical signal into the flow rate of the medium.
The acute included angles between the ceramic piezoelectric sheets 21 in the two mounting seats 23 and the central axis of the pipe section 1 are equal. Because the ceramic piezoelectric pieces are arranged on the slope surface of the acoustic wedge 22, the included angles between the two ceramic piezoelectric pieces 21 and the central axis of the pipe section 1 respectively comprise an obtuse angle and an acute angle, and the included angles serving as the acute angles are equal in degree. For the purpose of matching, the two ceramic piezoelectric sheets 21 need to emit the excited ultrasonic waves to each other.
Referring to fig. 4, since the two ceramic piezoelectric plates 21 have a certain distance therebetween, in order to ensure that the ultrasonic wave excited by one of the ceramic piezoelectric plates 21 can be successfully received by the other ceramic piezoelectric plate 21 even after being refracted for multiple times in the pipe section, the length range of the acoustic wedge 22 is determined by the following formula:
wherein, the first and the second end of the pipe are connected with each other,
is the internal diameter of the pipe section,
being the length of the acoustic wedge 22,
is the angle of incidence of the ultrasonic waves in the acoustic wedge 22;
for the propagation velocity of the ultrasonic waves in the pipe fluid,
is the propagation velocity of the ultrasonic wave in the acoustic wedge 22.
In some embodiments, the angle of incidence of the ultrasonic waves in the acoustic wedge 22
Can be determined by the angle of the ceramic piezoelectric sheet 21, while the inner diameter of the pipe section 1
The propagation speed of the ultrasonic wave in the pipeline fluid (medium) can be determined according to actual requirements
And propagation velocity in the acoustic wedge 22
Are all easy to measure. In particular, the solution of the invention makes use of the angle of incidence of the ultrasonic waves in the acoustic wedge 22
Angle of incidence of ultrasonic waves in pipe wall
And the angle of incidence of the ultrasonic waves in the pipe section
Relationship of three angles:
(wherein the content of the first and second components,
the propagation velocity of the ultrasonic waves in the pipe wall) so that the ultrasonic waves can be generated by measuring the incident angle of the ultrasonic waves in the acoustic wedge 22 only
The numerical range of the length of the acoustic wedge can be determined, so that the ultrasonic wave excited by one ceramic piezoelectric sheet 21 can be still successfully received by the other ceramic piezoelectric sheet 21 corresponding to the ultrasonic wave no matter how many times the ultrasonic wave is refracted in the pipe section, that is, other parameters in the design and production process are easy to determine, and the smooth implementation of the invention is ensured.
The invention combines the advantages of the prior pipeline type and clamping type ultrasonic flow meters, does not need to arrange a reflector, and passes the installation angle of the ceramic piezoelectric plate (namely the incident angle of the ultrasonic wave in the acoustic wedge 22)
) The length range of the acoustic wedge is determined, and the ultrasonic waves can be received smoothly after being refracted for a plurality of times in the pipe section.
In the spacecraft, the probability of failure occurrence should be reduced by reducing the number of connection points as much as possible, so that the mounting seat 23 is cuboid and is defined by a top cover 232, the outer wall of the pipe section 1 and four side walls 231; the four side walls 231, the acoustic wedge 22 and the pipe section 1 are integrally formed. The specific technical means of the integral forming may be machining or direct integral casting, as long as the purpose of the integral forming is achieved, and the invention is not limited.
Compared with a clamping type ultrasonic flowmeter, the invention adopts an integrated design, does not need to separately arrange a clamp or a reinforcing device, not only simplifies the structure, but also realizes the lightweight design of the ultrasonic flowmeter to a certain extent, thereby reducing the process cost to a certain extent when being used in the space field; on the other hand, through the integrated design, the problems that the transmission or the strength of the sound wave signal is influenced due to the looseness of the reinforcing device can be avoided, and the reliability of the ultrasonic wave signal is ensured; meanwhile, the influence on the measurement precision caused by the displacement of the probe due to the looseness is avoided to a certain extent.
In order to facilitate the installation of the ceramic piezoelectric sheet 21, the top cover 232 is fixed by bolts. And a sealing ring 234 is additionally provided for improving the sealing property. The ceramic piezoelectric sheet 21 is directly adhered to the slope surface of the acoustic wedge 22 by using epoxy resin, and the concrete shape of the slope surface corresponds to the ceramic gasket, so that the ceramic piezoelectric sheet can be better supported. In addition, the mounting seat 23 is filled with a potting adhesive 233. The potting adhesive 233 prevents the ceramic piezoelectric plate 21 from shaking, and the potting adhesive 233 can absorb an excessive sound wave, thereby improving the directivity of the ultrasonic wave. After the potting adhesive 233 is filled, the top cover 232 is fastened by bolts.
The pipe section 1 and the medium conveying pipeline can be connected in a welding mode or in a mode of being connected through flanges at two ends. When in connection, the upstream and downstream conveying pipelines are connected in a welding or flange connection mode. The two modes respectively have advantages, the welding can reduce connection points, and the flange connection is convenient to mount and dismount and can be selected according to specific requirements. Of course, the form of welding is preferred for aerospace applications.
In addition, in some embodiments, the pipe section 1 is cylindrical, and the two ultrasonic probes 2 are located on the same bus of the pipe section 1. Even if the pipe section 1 has other shapes, the two ultrasonic probes 2 may be positioned on the same line parallel to the medium flow direction in order to improve the metering accuracy. In addition, due to the fact that maintenance conditions are generally lacking in the working conditions of aerospace application, the redundancy of some devices can be considered while the stability of the devices is guaranteed as much as possible. For example, two groups of ultrasonic probes 2 are provided, and one group of ultrasonic probes 2 comprises a front ultrasonic probe and a rear ultrasonic probe which are positioned on the same bus of the pipe section 1; and the two groups of ultrasonic probes 2 are positioned on the same plane. In this way, when one group of ultrasonic probes 2 fails, the other group of ultrasonic probes 2 can be started, and the metering work is ensured not to be interrupted. In fact, under extreme conditions, the two ultrasonic probes 2 positioned on the diagonal line can also perform the metering work, and further the metering work is guaranteed.
In addition, as shown in fig. 6, the invention further provides an integrated ultrasonic flowmeter system for aerospace, which comprises two integrated ultrasonic flowmeters for aerospace; each ultrasonic flowmeter is provided with two groups of ultrasonic probes 2. The group of ultrasonic probes 2 comprises a front ultrasonic probe and a rear ultrasonic probe which are positioned on the same bus of the pipe section 1; the two groups of ultrasonic probes 2 are positioned on the same plane.
One of the two aerospace integrated ultrasonic flow meters is used for detecting the flow of an oxidant in an oxidant pipeline, and the other one of the two aerospace integrated ultrasonic flow meters is used for detecting the flow of fuel in a fuel pipeline; the system also comprises two sets of control systems, wherein one control system is a main control system, and the other control system is a backup control system; the main control system and the backup control system are respectively connected with the two groups of ultrasonic probes in the integrated ultrasonic flowmeter for aerospace.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a component of' 8230; \8230;" does not exclude the presence of another like element in a process, method, article, or apparatus that comprises the element.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The utility model provides an aerospace is with integration ultrasonic flowmeter which characterized in that: the ultrasonic flow meter comprises a pipe section, wherein at least two ultrasonic probes are arranged on the outer wall of the pipe section in the front and back directions along the axial direction of the pipe section; the ultrasonic probe comprises a mounting seat fixedly arranged on the outer wall of the pipe section; the mounting seat is internally provided with a sound wedge, the sound wedge comprises a slope surface, and a ceramic piezoelectric sheet for exciting or receiving ultrasonic waves is attached to the slope surface; acute included angles between the ceramic piezoelectric sheets in the two mounting seats and a central axis of the pipe section are equal, and the length of the acoustic wedge and an incident angle of the ultrasonic wave in the acoustic wedge satisfy a formula:
，
wherein the content of the first and second substances,
is the internal diameter of the pipe section in question,
for the length of the acoustic wedge to be,
the incident angle of the ultrasonic wave in the acoustic wedge;
for the speed of propagation of said ultrasonic waves in the pipe fluid,
is the propagation speed of the ultrasonic wave in the acoustic wedge.
2. The integrated ultrasonic flowmeter for aerospace according to claim 1, wherein: the mounting seat is cuboid and is defined by a top cover, a pipe section outer wall and four side walls; the four side walls, the acoustic wedges and the pipe section are integrally formed.
3. The integrated ultrasonic flowmeter for aerospace according to claim 1, wherein: and the mounting seat is filled with pouring sealant.
4. The integrated ultrasonic flowmeter for aerospace according to claim 1, wherein: and two ends of the pipe section are welded with the conveying pipe of the medium to be measured.
5. The integrated ultrasonic flowmeter for aerospace according to claim 1, wherein: and flanges used for being connected with a conveying pipe of a medium to be measured are arranged at two ends of the pipe section.
6. The integrated ultrasonic flowmeter for aerospace according to claim 1, wherein: and a connector assembly used for being connected with an upper computer is arranged on the mounting seat.
7. An integrated ultrasonic flowmeter for aerospace according to claim 1, wherein: the pipe section is cylindrical, and the two ultrasonic probes are located on the same bus of the pipe section.
8. The integrated ultrasonic flowmeter for aerospace according to claim 1, wherein: the pipe section is a straight pipe.
9. The integrated ultrasonic flowmeter for aerospace according to claim 7, wherein: the ultrasonic probes are divided into two groups, and one group of ultrasonic probes comprises a front ultrasonic probe and a rear ultrasonic probe which are positioned on the same bus of the pipe section; and the two groups of ultrasonic probes are positioned on the same plane.
10. The utility model provides an aerospace is with integration ultrasonic flowmeter system which characterized in that: comprising two integrated aerospace ultrasonic flow meters according to claim 9; one of the two aerospace integrated ultrasonic flow meters is used for detecting the flow of an oxidant in an oxidant pipeline, and the other aerospace integrated ultrasonic flow meter is used for detecting the flow of fuel in a fuel pipeline; the integrated ultrasonic flowmeter system for aerospace also comprises two sets of control systems, wherein one control system is a main control system, and the other control system is a backup control system; the master control system and the backup control system are respectively connected with two groups of ultrasonic probes in the aerospace integrated ultrasonic flowmeter.
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| CN115977803A (en) * | 2023-03-15 | 2023-04-18 | 成都流体动力创新中心 | Backflow-preventing injector capable of achieving multiple injection angles |
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| CN115493662B (en) | 2023-03-03 |
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